Hate to tell you this DaveW, however, an Int'l Airport I once worked for over here made a Runway charge - not a landing fee - actually you're charged on departure.
Where I fly from at the minute has introduced a charge for "movements" and I had to query their interpretation of a movement.....turns out it included touch & go's although had not been explicit between arr. / deps or both.
Basically beware and question charges - airport operators are running a profitable business - or so they hope.